Home / 128,278,841.37-192,405,021.69-87,044,475.72

Finding the Fourth Proportional to 128,278,841.37, 192,405,021.69 and 87,044,475.72

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Solution

The fourth proportional to 128,278,841.37, 192,405,021.69 and 87,044,475.72 is: 130,557,729.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278,841.37 : 192,405,021.69 = 87,044,475.72 : x
  2. Step 2: Convert to fraction form
    128,278,841.37/192,405,021.69 = 87,044,475.72/x
  3. Step 3: Cross multiply
    128,278,841.37x = 192,405,021.69 × 87,044,475.72
  4. Step 4: Simplify right side
    128,278,841.37x = 16,747,794,238,901,278
  5. Step 5: Solve for x
    x = 16,747,794,238,901,278/128,278,841.37
  6. Step 6: Final answer
    x = 130,557,729.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.